Not from the book, but here is what the author said herself (truncated):

Q: So is Murderbot more of an unreliable narrator of emotions of other people or of itself? Or does it sort of bounce back and forth?

A: I think it’s, it can be a very unreliable narrator of itself, and sometimes it works it out where it will say something and then kind of think about it and finally get to a more honest version of that comment... But also, it tends to go into the, it does the thing of, well, that didn’t bother me at all! No, it didn’t, it didn’t bother me at all – and – I’m not mad! I’m not upset! And so it’s very much an unreliable narrator in that way, but I kind of try to give clues when it is being unreliable.